Evaluation Of The Videos About Intraoral Devices For Bruxism On Youtube™ Background: Stabilization splints can prevent unwanted effects of bruxism. As online healthcare information becomes more popular, YouTube™ has become the first source for users to consult about their health problems. The aim of this study is to evaluate the quality, reliability, and content of the YouTube™ videos about intraoral devices to evaluate whether there is a reliable and useful source for bruxism patients. Methods: In this study, the term “Night Guard” was searched on YouTube™. Sixty videos on the subject were evaluated in terms of content, quality, and reliability. The included videos were analyzed for views, duration, time since video upload, likes/dislikes, number of comments, and source. Each video was classified according to the quality of information content as “useful information”, “misleading information”, “useful user view” and “misleading user view”. The Kruskal-Wallis test, The Mann-Whitney Chi-square test correlation analyses were performed. Results: 18 videos (30%) were uploaded by healthcare professionals, 22 videos (37%) by users, 14 videos (23%) by product suppliers, and 6 videos (10%) by TV / Magazine publishers. In examining the Global Quality Scales (GQS), healthcare professionals have higher scores than others. Reliability scores of the videos uploaded by healthcare professionals are significantly higher than the other groups. (p: 0.003) Also, 17 (%28.3) of the 60 videos are in the misleading video category. Conclusion: YouTube™ can be a platform with the potential for misleading in the use of intraoral devices. Health-related issues should not be tried to be resolved without professional support.